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Centroceras gasparriniiKützing

Growing epiphytically on Laurencia.
North America (Florida), Bocas del Toro, Panama
Female gametophyte thallus reddish, 1.0 to 3.5 cm high, filiform, erect, consisting of nodal and internodal segments, completely corticated. Main axes with alternate branching pattern, dichotomous at the middle-apical portion; trichotomous and tetrachotomous branching is common throughout the thallus, as are adventitious branches. Internodes 100–165 µm wide and 100–400 µm long. Apices forcipate. Cortication at node consisting of 17 periaxial cells, each cutting off three cortical initials. The first cortical initial cuts off two cortical cells, or a spine and a cortical cell, or a cortical cell and an ovoid gland cell. The second cortical initial cuts off a cortical cell acropetally and a cortical filament basipetally. The third cortical initial cuts off a basipetal filament. All the basipetal filaments contribute to the complete cortication of the internodes. Tetrasporangia tetrahedrally divided, positioned laterally or whorled at the distal to middle portions of thallus, covered by uniseriate involucral branches. Carposporophytes globose, surrounded by several involucral branches that also bear spines.
In Bocas Del Toro
Reported ByNSF-PASI Advanced Methods in Tropical Phycology Course 2009
LocalityMimbi Timbi, Isla Colón
CommentsThe cortication pattern and the presence of involucral branches surrounding the tetrasporangia are the main diagnostic features that led to the determination of this species. This is the first record of the carposporophytic stage in the species, indicating that the thalli in this reproductive phase are significantly smaller than in the other stages collected in the field.
Compiled by
Gabriela Garcia Soto & Lizette Irene Quan Young
Field Guide to Common Marine Algae of the Bocas del Toro Area II: NSF-PASI Advanced Methods in Tropical Phycology Course 2009
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